Otaku Engineer in Great Tang Dynasty Chapter 1456: Phone design and speakers!
"Xiaoxuan, how did you abuse King Wei like this? If your majesty knows, how can he spare you lightly?"
In the Qiquge Workshop, after Li Zexuan solved the problem for Li Tai, he was pulled aside by Cheng Yaojin and complained in a low voice.
"This...Uncle Cheng, where do you start? Why did I abuse the blue bird?"
Li Zexuan heard the words, and said in amazement.
Cheng Yaojin thought that Li Zexuan was embarrassed to admit it, he couldn't help but curled his lips and said, "Hey! This is not abuse? How often did the old man see Wei Wang not being a clean, decent, handsome man? You see Look at him now, what's the difference between him and the ordinary craftsman in your workshop? If he didn't make a sound just now, the old man almost didn't recognize it! In the words of their literati, he was unkempt, and the margins were not repaired!"
In order to show that Li Tai was indeed abused, Cheng Yaojin racked his brains and used a few idioms, but unfortunately he still used the wrong one!
Li Zexuan was speechless for a while. He paused for a moment. He said: "Uncle Cheng, Qingque is participating in a cutting-edge technology research project of the academy. These few days are indeed very hard, but all of this is his willingness. Yes, how can you always say that I abused him?"
"Research project? What research project? Oh, yes! Ugly cow kid didn't go home last weekend. Your aunt has been talking about it for a while! Could it be that he is also participating in this research project?"
Cheng Yaojin's eyes lit up when he heard this, and then he thought of his precious son, and asked quickly.
"Uh..."
Now Li Zexuan is speechless, saying that Cheng Yaojin can really value his son. With Cheng Chumo's grades and unsettled temperament, how could Li Zexuan arrange for him to do scientific research? Chumo is still recovering from his injuries in the hospital. If he tells the truth, he will get fattened again if he is not sure. After thinking about it, Li Zexuan can only vaguely say:
"That's right! But the recent research projects carried out by the academy are all top-secret. No one can tell anyone outside the project. This is a rigid rule, and my nephew should not make an exception. Excuse me!"
"Top secret? What project is so mysterious?"
When Cheng Yaojin heard it, he became even more interested. For Li Zexuan’s ability to create new things, Lao Cheng was 10,000 persuaded. For example, the variable speed disc brake bicycle that he can’t put down now can make Li Zexuan do this. A serious project, it must be a good project, so he asked unwillingly:
"Xiao Xuan, really can't tell the old man a little? You Uncle Cheng is not an outsider, so it is impossible to tell others. Besides, you are the head of the Yanhuang Academy. Isn't this rule set by you? What are you doing?"
Li Zexuan said helplessly: "Uncle Cheng, just because I am the head of Yanhuang Academy, I have to lead by example. If I don't abide by the rules, how can I expect other people in the academy to abide by the rules? So this thing is true. I can’t tell you! Don’t worry, this research project is definitely good for Datang!"
"No! Isn't this the equivalent of not saying it?"
Old Cheng Nian uttered a word, but he also knew that it was impossible to ask the truth from Li Zexuan, so he did not continue to ask. Seeing the brand-new bicycle he was pushing, Lao Cheng became excited again. He laughed and said:
"Haha! So busy, Xiaoxuan! The old man first go back to Chang'an! I don’t need that old bicycle, just have this one! Haha!"
It turns out that Lao Cheng is a person who loves the new and dislikes the old. This old guy is riding a variable-speed bicycle and left the workshop like a gust of wind. Pity the old bicycle he rode over can only lie quietly in the workshop. A certain corner is ashes!
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After Cheng Yaojin left, Li Zexuan arranged for someone to send the remaining variable speed bicycles to Qin Qiong, Yuchi Jingde, Niu Jinda, and Li Jing's homes. These companies have the closest relationship with him. If there are good things, we definitely cannot Forget about them. In addition, Li Zexuan also sent Liu Feng and Liu Yun to the palace to give three variable-speed bicycles to Li Er, Li Chengqian and Changle.
By the way, after Changle’s qi disease is cured, the whole person is more active and active than before. Now it is just right to send her a variable-speed bicycle!
"Qing Que, I suddenly had an idea as a teacher, is it feasible for you to come and listen?"
After all arrangements were made, Li Zexuan went to a courtyard in the deepest part of the workshop, found Li Tai who was modifying the telegraph, and said.
This other courtyard is the secret research base of the Academy’s second and third assassin projects. Outside the courtyard is guarded by Li Zexuan’s guards day and night. All personnel entering and exiting must be verified for identity, which is considered tight guard!
At present, the participants of these two killer projects are intensively recruiting and screening, but this does not affect Li Tai, the deputy chief designer, to promote related work. In just a few days, Li Tai has created With the addition of simple electronic components such as resistors, capacitors, and inductors, coupled with the electronic diodes and electronic transistors made by the workshop, it can be said that the foundation of Datang's electronic industry has gradually taken shape!
"Oh? Shanchang, please say!"
The busy Li Tai immediately put down his work when he heard the words and raised his head to look at Li Zexuan.
After having "mixed" with Li Zexuan for so long, Li Tai knew that every thought of Li Zexuan could change this era. He didn't dare to despise it!
Li Zexuan pondered for a moment, and said: "Qingque, the telegraph we are making now transmits information through the mutual conversion of electricity and electromagnetic waves. This type of telegraph is indeed able to coordinate strategies and anticipate the enemy's opportunities when used in the military. , But if civilians have the need for ultra-long-distance communication in the future, the telegraph will appear inconvenient!
So what I think is that we might be able to make a device that converts sound into electricity, and then electricity into sound. That way, only a wire connection is needed to achieve real-time on both ends of the wire. Transmission! "
This is actually a wired phone. Li Zexuan wanted to do it a long time ago, but before Datang had no industrial foundation and couldn’t do it if he wanted to. Now it’s different...
These remarks may sound a little fanciful to others, but Li Tai did not rush to deny it. He pondered for a long time before he said:
"Electric harmony? Shan Chang, your idea sounds ok, but when it comes to implementation, our first step is to solve the problem of how to convert the two completely different energies of electric harmony to each other!"
Professional!
I have to say that Li Tai is now more professional than before, and he can see the essence of the problem at a glance.
Li Zexuan said in appreciation: "Haha! Qingque, you are right! To achieve long-distance real-time sound transmission, the first problem is to solve the problem of mutual conversion of electric harmony! Although they are two different from each other Energy, but it may not be impossible to transform each other! For example, the previous electricity and magnetism are not of the same kind, but with the efforts of Miss Mo, can they also be transformed into each other now? I have a preliminary idea here, I Let me tell you first, think about it in private!"
"Uhhhhhhhh! Shanchang, please say!"
Li Tai nodded hurriedly, not at all downhearted because Li Zexuan wanted to add a burden to him. He is a person who is born with a new love and pursues new technology. Otherwise, he would not let the Xiaoyao lord improper, but went to the workshop. Suffered!
Li Zexuan picked up paper and pen, and drew while writing: “In fact, it’s not difficult to convert electrical energy and sound energy. It’s just that magnetic energy is needed in the middle to be an intermediary! Green bird, we can The front end of the machine uses this cone-shaped paper cone to collect sound. If you have studied Physics, you should know that sound is a sound wave generated by the vibration of an object. Similarly, when the sound wave hits the paper cone, it will make the paper The surface of the basin produces tiny vibrations.
At this time, if we attach a copper coil to the bottom of the paper cone, and then place the copper coil in a permanent magnetic field, when the front of the paper cone receives sound, it will drive the coil to vibrate and the coil will cut the magnetic induction line , Will generate a current corresponding to the frequency of the sound wave, and we have completed the process of generating electricity by sound wave!
How to convert electricity into sound waves, this is also simple. You can also attach a coil to the bottom of the paper cone and apply a permanent magnetic field. When the current passes through the coil, the corresponding magnetic field is generated in the coil. This magnetic field and the applied permanent magnetic field produce an interaction force. This force causes the coil to vibrate with the sound current in the applied permanent magnetic field. The cone diaphragm and the coil are connected together, so the diaphragm also vibrates .
You should know that under the same voltage, the size of the magnetic field generated by the same energized coil is proportional to the size of the current. Therefore, when the current passing through the coil is larger, the movement of the coil in the magnetic field is more violent and the sound emitted is also The bigger it is, so the vibration of the coil can produce a sound similar or identical to the original audio signal waveform.
Therefore, we can realize the conversion from sound to electric current and then electric current to sound. As long as the wire is long enough and the electric energy is large enough, our voice can travel far enough! "
Li Tai was a bit dumbfounded. Faced with such an ingenious design, he was so excited that even his breathing was overwhelming. Perhaps this is just suffocating for dreams!
After a long time, Li Tai finally recovered from the shock. He took a few deep breaths, then looked at Li Zexuan with the look of monsters, opened his mouth, and couldn't speak for a long time!
"Mountain...Mountain long, this design is so ingenious! It's ingenious and amazing!"
The mouth was trembling for a long time, and Li Tai finally said, "If it can be done, then there will be no need for a telegraph at all! Shanchang, otherwise we will directly start to study this thousand-mile sound transmission machine and give up improving the telegraph. , How?"
Li Zexuan waved his hand quickly and said, "No! Qingque, what I told you just now was just my idea. From idea to product, there is still a long way to go, even if you do Come out, the later audio debugging will take a long time, and the improvement plan of the telegraph has been deliberated countless times, and now it is completely a matter of course, and we must not leave it alone!
Compared with this kind of sound transmission, telegraphs are not useless, especially for military communications. Telegraphs have better confidentiality. Even if the enemy has captured our telegraphs, they have no password. The book is still useless! In addition, the telegraph machine does not need wires to send and receive telegrams, which is the most convenient when fighting! So in any case, be sure to change the telegraph machine first! "
Listening to what Li Zexuan said, Li Tai also woke up from his excitement. He nodded and said: "Yeah! I understand!"
It's just that a touch of disappointment flashed in his eyes. The feeling that he knew that there was a more advanced thing, but he didn't have the time to create it, really made Li Tai uncomfortable!
Li Zexuan smiled when he saw it. He patted Li Tai on the shoulder and said: "However, although we currently don't have the energy to build a long-distance sound transmission machine, we can build a simple sound-electric conversion Installation, it shouldn’t take long!"
"Oh? Shan Chang, what do you say?"
Li Tai's eyes lit up and said quickly.
Li Zexuan smiled and said: "I just want to make a small thing, Qingque will help you make it for the teacher! This thing is to use the paper cone diaphragm to convert the human voice into electric current, and then use a triode to amplify the electric current , The amplified current flows through the coil, and then through the action of the magnetic field, it vibrates with a more violent amplitude, so that the sound that comes out is louder! I call this a loudspeaker or a speaker, compared to the kind of long-distance transmission Sound machine~IndoMTL.com~ This thing is much simpler, if you have the time, try to make one first!"
Li Tai thought about it for a while, and then excitedly said: "This is a good idea! The loudspeaker is simple to make, but the principle is similar to that of the long-distance sound transmission machine. If this thing can be made, in the future Doing that remote sound transmission machine is even more informed!"
Li Zexuan nodded and said: "That's the truth!"
After that, he looked at the shadow of the tree outside the house and said: "Okay! Let's do this for now, Qingque, keep busy, I will go now!"
Li Tai hurriedly bowed and said, "The long mountain walks slowly!"
After experiencing this incident, he admired Li Zexuan even more. It was like a high mountain standing up and down, Jingxing stopped, although he couldn't reach it, he yearned for it!
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"Your Majesty, your Royal Highness, please see you!"
About Shenshi, the palace, the temple of Ganlu.
After reviewing the memorial for a while, Li Er, who was dozing off his chin, was suddenly awakened by a shrill voice. Who else could it be Zhao Song? Speaking of this "special" moment, only Zhao Song dared to come over and report the matter.
"Oh? Cheng Qian is here? Let him in!"
Li Er rubbed his sleepy face and cheered up.
"Here~!"
Zhao Song took the order and left, and couldn't help but breathe a sigh of relief in his heart.
After a while, Li Chengqian came in, and he didn't come in alone, and he also... pushed a car!
Seeing this scene, Lao Li immediately lost any sleepiness. Before Li Chengqian saluted him, he opened his mouth and said, "Chengqian, why did you push a bicycle in? Huh? No! This bicycle seems a bit weird. ......."
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